Tana teeeitoey



(No Model.)

C. W. OAKES 8a E. B. CAMP.

HOT AIR PURNAGE.

WITNBSSBS INVENTOR ATTORNEYS.

llhuirnn Spares Parente CHARLES VILLIAM OAKES AND EDGAR BGYD CAMP, OFBILLINGS, MON- TANA TERRITRY.

HOT-'AIR FURNC.

SEIFGATQN 'orrning part of Letters Patent No. 321,632, dated July 7,3.885.

Application filed June 12, l8B4.

T0 @ZZ zutol/ it may concern.-

Be it known that we, CHARLEs XVILLIAM Onnns and EDGAR B. CAMP, ofBillings, in the county of Yellowstone and Territory of Montana, haveinvented a new and Improved Hot-Air Furnace, of which the following is afull, clear, and exact description.

Reference is to be had to the accompanying drawings, forming a part ofthis speciiication, in which similar letters of reference indicatecorresponding parts in all the iigures.

Figure l is a sectional side elevation of our new and improved furnace,taken on the line a"- of Fig. 3. Fig. 2 is a sectional plan View, takenon the line y y of Fig. 3, and Fig. 3 is a front elevation of thefurnace.

The invention will first be described in connection with the drawings,and then pointed out in the claim.

Referring to the drawings, A represents the outer casing of the furnace,closed at its ends by the end walls, B B.

Vithin the outer casing, A, is placed the snialler casing C, closed atits ends by the said end wall, B, andthe opposite inner wall, G,whicl1latter, with the outer wall, B', forins the hot-air space D,whichcommunicates with the surrounding hot-air space E, formed by the innerand outer casings` A C.

The space G inclosed by the inner casing, C, bottom F, and the said endwalls, B C', is the fire box or chamber of the furnace, which isconnected to the chimney by the pipe H.

In the tire-chamber G are placed, above the center tl1ereoi',thehorizontal air-heating drnnis or cylinders J J, and series of verticalor nearly vertical air inlet and heating pipes K, which connect theheatingcylinders J with the external air through suitable openings madethrough the bottoni F. The heatingdrums J communicate with the hot-airspace D through suitable openings made in the inner wall, C', as shownclearly in Fig. l.

L are the grate-bars of the furnace, below which is formed the ash-pitM, and N N are the pipes for conducting the heated air from thesurrounding air-space E to suitable distributing-pipes leading todifferent parts of the building.

ln the front wall, B, above the heating-drums (No model.)

J, is formed the opening O, closed by a suitable cap, so that byremoving the cap the drums J may be cleaned of any soot or ashes thatmay collect upon them, and below the opening O is formed in the frontwall B the door P, through which the fuel may be introduced into thefurnace upon the grate-bars L.

It will be noticed that the grate-bars L are located betweentlie seriesof vertical air-inlet pipes K, and that the said series of pipes con'Verge toward each other so as to stand partially over the grate-bars attheir upperends, leaving considerable space between the outer surfacesof the pipes and the inner surfaces of the inner casing, C, thusfurnishing space for the fire to circulate freely among and around thepipes K, and causing atthe same timethe aine to spread and nearlyencompass 4the drums J. In this manner a large and very effectiveheating-surface is furnished within the fire-box G withoutmateriallyinterfering with the draft of the furnace, and the innercasing, C, and end wall, C', furnish another very large and effectiveheating-surface for the air, so that all ofthe available heat from thefurnace will be taken up by the air and distributed through thebuilding, making the furnace very economical in fuel.

Having thus described our invention, we cla-ini as new and desire tosecure by Letters Patent# The hot-air furnace herein described, the sameconsisting, essentially, in outer casing, A, having end walls,B B", theinner casing, C, having a rear end wall, C', between which and the endwall B an air-space, D, is formed, the air-space E between the top andsides of the said casings, the lire-box G, formed by the interior of theeasing C, the two horizontal drums J in the upper part of casing C, theseries of Vertical inclined pipes K, extending from the drums J toopenings in the bottoni F, and the grate L in the space between thedrnins and pipes K, substantially as set forth.

CHAS. VILLIAM OAKES. EDGAR BOYD CAMP.

Witnesses:

J oHN H. Gnnnisu, C. G. CHILD.

